Earl of Tyrone’s Regiment of Foot

Active1605 to 1681
ConflictsEighty Years War
Thirty Years War
ColonelEarl of Tyrone
Arthur O’ Neill
Area RaisedIreland
Coat Colour
Flag Colour
Flag Design
Field Armies

Veteran Irish regiment in Spanish Service, known as the Old Irish Tercio

Later Colonel Arthur O’ Neill’s Regiment of Foot

Service History


  • Raised by Henry O’ Neill, 3rd Earl of Tyrone


  • Sean O’ Neill, 4th Earl of Tyrone takes command



  • Arthur O’ Neill in command


Raised from Irish fugitives from the Nine Years’ War, the Earl of Tyrone’s regiment served Spain from 1605 until disbanded in Catalonia in 16811). Due to their antiquity the regiment were known as Tercio viejo de Irlandeses, or the Old Irish Tercio. They were engaged in the Thirty Years War in the Palatinate campaign and later at the sieges of Bergen-op-Zoom and Breda.

Coats, Flags & Equipment

Notable Officers

Hugh Eogan O’ Neill, 5th Earl of Tyrone

Descendant of Hugh O’ Neill, Earl of Tyrone, Irish leader during the Nine Years’ War, the O’ Neill’s had been attainted but were granted the title Count of Tyrone by the Spanish court.

Arthur O’ Neill

Owen Roe O’ Neill

Owen Roe O’ Neill served as Major of the regiment


See Also